1. Usage scenarios:

A (with Aidl) AAR; B (with Aidl) AAR depends on a;

C (APP) relies on a and B AAR libraries

At this time, both a and B have the same Aidl interface class to report the above error!

2. Problem solving

B (Aidl) AAR depends on A. you can remove the Aidl interface class in class B.